> I am working on some samples where I want to write to HDFS running on> another machine (different OS etc.)> The identity of my client process is just whatever my OS says it is> (e.g., 'oleg') hence:>> 08:56:49,240 DEBUG IPC Client (47) connection to /192.168.15.20:54310from oleg ipc.Client:803 - IPC Client (47) connection to /> 192.168.15.20:54310 from oleg got value #2>> But there is no 'oleg' where the hadoop is running. Instead there is> 'hduser'.>> Is there a way or an equivalent of "RunAs" in hadoop?>> Thanks> Oleg>

> Hi,>> You might be looking for something like :> UserGroupInformation.createRemoteUser(user).doAs(>> see>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>> It is a JAAS wrapper for Hadoop.>> Regards>> Bertrand>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <> [EMAIL PROTECTED]> wrote:>>> I am working on some samples where I want to write to HDFS running on>> another machine (different OS etc.)>> The identity of my client process is just whatever my OS says it is>> (e.g., 'oleg') hence:>>>> 08:56:49,240 DEBUG IPC Client (47) connection to /192.168.15.20:54310from oleg ipc.Client:803 - IPC Client (47) connection to />> 192.168.15.20:54310 from oleg got value #2>>>> But there is no 'oleg' where the hadoop is running. Instead there is>> 'hduser'.>>>> Is there a way or an equivalent of "RunAs" in hadoop?>>>> Thanks>> Oleg>>>>>> --> Bertrand Dechoux>

So now I am passed it and able to RunAs 'hduser', but when I attempt toread from FSDataInputStream i see this message in my console

10:12:10,065 WARN main hdfs.DFSClient:2106 - Failed to connect to /127.0.0.1:50010, add to deadNodes and continuejava.net.ConnectException:Connection refused

10:12:10,072 INFO main hdfs.DFSClient:2272 - Could not obtain blockblk_-4047236896256451627_1003 from any node: java.io.IOException: No livenodes contain current block. Will get new block locations from namenode andretry...I am obviously missing a configuration setting somewhere. . . any idea?

> After i clicked send I found the same link ;), but thank you anyway.>> Oleg>>> On Fri, Oct 5, 2012 at 9:34 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>> Hi,>>>> You might be looking for something like :>> UserGroupInformation.createRemoteUser(user).doAs(>>>> see>>>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>>>> It is a JAAS wrapper for Hadoop.>>>> Regards>>>> Bertrand>>>>>>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <>> [EMAIL PROTECTED]> wrote:>>>>> I am working on some samples where I want to write to HDFS running on>>> another machine (different OS etc.)>>> The identity of my client process is just whatever my OS says it is>>> (e.g., 'oleg') hence:>>>>>> 08:56:49,240 DEBUG IPC Client (47) connection to /192.168.15.20:54310from oleg ipc.Client:803 - IPC Client (47) connection to />>> 192.168.15.20:54310 from oleg got value #2>>>>>> But there is no 'oleg' where the hadoop is running. Instead there is>>> 'hduser'.>>>>>> Is there a way or an equivalent of "RunAs" in hadoop?>>>>>> Thanks>>> Oleg>>>>>>>>>>> -->> Bertrand Dechoux>>>>

Indeed, you are connecting to localhost and you said it was a remoteconnection so I guess there is nothing there which is relevant for you.The main idea is that you need to provide the configuration files. They areread by default from the classpath. Any place where you have aConfiguration/JobConf you could also set up the right properties whichwould be the location of the HDFS master (and mapred if you want to dosomething about it).

> So now I am passed it and able to RunAs 'hduser', but when I attempt to> read from FSDataInputStream i see this message in my console>> 10:12:10,065 WARN main hdfs.DFSClient:2106 - Failed to connect to /> 127.0.0.1:50010, add to deadNodes and continuejava.net.ConnectException:> Connection refused>> 10:12:10,072 INFO main hdfs.DFSClient:2272 - Could not obtain block> blk_-4047236896256451627_1003 from any node: java.io.IOException: No live> nodes contain current block. Will get new block locations from namenode and> retry...>>> I am obviously missing a configuration setting somewhere. . . any idea?>> Thanks>> Oleg>> On Fri, Oct 5, 2012 at 9:37 AM, Oleg Zhurakousky <> [EMAIL PROTECTED]> wrote:>>> After i clicked send I found the same link ;), but thank you anyway.>>>> Oleg>>>>>> On Fri, Oct 5, 2012 at 9:34 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>> Hi,>>>>>> You might be looking for something like :>>> UserGroupInformation.createRemoteUser(user).doAs(>>>>>> see>>>>>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>>>>>> It is a JAAS wrapper for Hadoop.>>>>>> Regards>>>>>> Bertrand>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <>>> [EMAIL PROTECTED]> wrote:>>>>>>> I am working on some samples where I want to write to HDFS running on>>>> another machine (different OS etc.)>>>> The identity of my client process is just whatever my OS says it is>>>> (e.g., 'oleg') hence:>>>>>>>> 08:56:49,240 DEBUG IPC Client (47) connection to /192.168.15.20:54310from oleg ipc.Client:803 - IPC Client (47) connection to />>>> 192.168.15.20:54310 from oleg got value #2>>>>>>>> But there is no 'oleg' where the hadoop is running. Instead there is>>>> 'hduser'.>>>>>>>> Is there a way or an equivalent of "RunAs" in hadoop?>>>>>>>> Thanks>>>> Oleg>>>>>>>>>>>>>>>> -->>> Bertrand Dechoux>>>>>>>>-- Bertrand Dechoux

> Indeed, you are connecting to localhost and you said it was a remote> connection so I guess there is nothing there which is relevant for you.> The main idea is that you need to provide the configuration files. They> are read by default from the classpath. Any place where you have a> Configuration/JobConf you could also set up the right properties which> would be the location of the HDFS master (and mapred if you want to do> something about it).>> Regards>> Bertrand>>> On Fri, Oct 5, 2012 at 4:15 PM, Oleg Zhurakousky <> [EMAIL PROTECTED]> wrote:>>> So now I am passed it and able to RunAs 'hduser', but when I attempt to>> read from FSDataInputStream i see this message in my console>>>> 10:12:10,065 WARN main hdfs.DFSClient:2106 - Failed to connect to />> 127.0.0.1:50010, add to deadNodes and continuejava.net.ConnectException:>> Connection refused>>>> 10:12:10,072 INFO main hdfs.DFSClient:2272 - Could not obtain block>> blk_-4047236896256451627_1003 from any node: java.io.IOException: No>> live nodes contain current block. Will get new block locations from>> namenode and retry...>>>>>> I am obviously missing a configuration setting somewhere. . . any idea?>>>> Thanks>>>> Oleg>>>> On Fri, Oct 5, 2012 at 9:37 AM, Oleg Zhurakousky <>> [EMAIL PROTECTED]> wrote:>>>>> After i clicked send I found the same link ;), but thank you anyway.>>>>>> Oleg>>>>>>>>> On Fri, Oct 5, 2012 at 9:34 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>>>> Hi,>>>>>>>> You might be looking for something like :>>>> UserGroupInformation.createRemoteUser(user).doAs(>>>>>>>> see>>>>>>>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>>>>>>>> It is a JAAS wrapper for Hadoop.>>>>>>>> Regards>>>>>>>> Bertrand>>>>>>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>> I am working on some samples where I want to write to HDFS running on>>>>> another machine (different OS etc.)>>>>> The identity of my client process is just whatever my OS says it is>>>>> (e.g., 'oleg') hence:>>>>>>>>>> 08:56:49,240 DEBUG IPC Client (47) connection to /192.168.15.20:54310from oleg ipc.Client:803 - IPC Client (47) connection to />>>>> 192.168.15.20:54310 from oleg got value #2>>>>>>>>>> But there is no 'oleg' where the hadoop is running. Instead there is>>>>> 'hduser'.>>>>>>>>>> Is there a way or an equivalent of "RunAs" in hadoop?>>>>>>>>>> Thanks>>>>> Oleg>>>>>>>>>>>>>>>>>>>>> -->>>> Bertrand Dechoux>>>>>>>>>>>>>>> --> Bertrand Dechoux>

> Yes I understand that and I guess I am trying to find that 'right> property'> I did find one reference to it in hdfs-defaul.xml>> <name>dfs.datanode.address</name>>> <value>0.0.0.0:50010</value>>> so i changed that in my hdfs-site.xml to>> <name>dfs.datanode.address</name>>> <value>192.168.15.20:50010</value>>>> But>>> On Fri, Oct 5, 2012 at 10:33 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>> Indeed, you are connecting to localhost and you said it was a remote>> connection so I guess there is nothing there which is relevant for you.>> The main idea is that you need to provide the configuration files. They>> are read by default from the classpath. Any place where you have a>> Configuration/JobConf you could also set up the right properties which>> would be the location of the HDFS master (and mapred if you want to do>> something about it).>>>> Regards>>>> Bertrand>>>>>> On Fri, Oct 5, 2012 at 4:15 PM, Oleg Zhurakousky <>> [EMAIL PROTECTED]> wrote:>>>>> So now I am passed it and able to RunAs 'hduser', but when I attempt to>>> read from FSDataInputStream i see this message in my console>>>>>> 10:12:10,065 WARN main hdfs.DFSClient:2106 - Failed to connect to />>> 127.0.0.1:50010, add to deadNodes and continuejava.net.ConnectException:>>> Connection refused>>>>>> 10:12:10,072 INFO main hdfs.DFSClient:2272 - Could not obtain block>>> blk_-4047236896256451627_1003 from any node: java.io.IOException: No>>> live nodes contain current block. Will get new block locations from>>> namenode and retry...>>>>>>>>> I am obviously missing a configuration setting somewhere. . . any idea?>>>>>> Thanks>>>>>> Oleg>>>>>> On Fri, Oct 5, 2012 at 9:37 AM, Oleg Zhurakousky <>>> [EMAIL PROTECTED]> wrote:>>>>>>> After i clicked send I found the same link ;), but thank you anyway.>>>>>>>> Oleg>>>>>>>>>>>> On Fri, Oct 5, 2012 at 9:34 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>>>>>> Hi,>>>>>>>>>> You might be looking for something like :>>>>> UserGroupInformation.createRemoteUser(user).doAs(>>>>>>>>>> see>>>>>>>>>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>>>>>>>>>> It is a JAAS wrapper for Hadoop.>>>>>>>>>> Regards>>>>>>>>>> Bertrand>>>>>>>>>>>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <>>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>>>> I am working on some samples where I want to write to HDFS running on>>>>>> another machine (different OS etc.)>>>>>> The identity of my client process is just whatever my OS says it is>>>>>> (e.g., 'oleg') hence:>>>>>>>>>>>> 08:56:49,240 DEBUG IPC Client (47) connection to /192.168.15.20:54310from oleg ipc.Client:803 - IPC Client (47) connection to />>>>>> 192.168.15.20:54310 from oleg got value #2>>>>>>>>>>>> But there is no 'oleg' where the hadoop is running. Instead there is>>>>>> 'hduser'.>>>>>>>>>>>> Is there a way or an equivalent of "RunAs" in hadoop?>>>>>>>>>>>> Thanks>>>>>> Oleg>>>>>>>>>>>>>>>>>>>>>>>>>> -->>>>> Bertrand Dechoux>>>>>>>>>>>>>>>>>>>>>> -->> Bertrand Dechoux>>>>

> sorry clicked send too soon, but basically changing that did not produce> any result, still seeing the same message.So I guess my question is what is> the property that is responsible for that?>> Thanks> Oleg>>> On Fri, Oct 5, 2012 at 10:40 AM, Oleg Zhurakousky <> [EMAIL PROTECTED]> wrote:>>> Yes I understand that and I guess I am trying to find that 'right>> property'>> I did find one reference to it in hdfs-defaul.xml>>>> <name>dfs.datanode.address</name>>>>> <value>0.0.0.0:50010</value>>>>> so i changed that in my hdfs-site.xml to>>>> <name>dfs.datanode.address</name>>>>> <value>192.168.15.20:50010</value>>>>>>> But>>>>>> On Fri, Oct 5, 2012 at 10:33 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>> Indeed, you are connecting to localhost and you said it was a remote>>> connection so I guess there is nothing there which is relevant for you.>>> The main idea is that you need to provide the configuration files. They>>> are read by default from the classpath. Any place where you have a>>> Configuration/JobConf you could also set up the right properties which>>> would be the location of the HDFS master (and mapred if you want to do>>> something about it).>>>>>> Regards>>>>>> Bertrand>>>>>>>>> On Fri, Oct 5, 2012 at 4:15 PM, Oleg Zhurakousky <>>> [EMAIL PROTECTED]> wrote:>>>>>>> So now I am passed it and able to RunAs 'hduser', but when I attempt to>>>> read from FSDataInputStream i see this message in my console>>>>>>>> 10:12:10,065 WARN main hdfs.DFSClient:2106 - Failed to connect to />>>> 127.0.0.1:50010, add to deadNodes and continuejava.net.ConnectException:>>>> Connection refused>>>>>>>> 10:12:10,072 INFO main hdfs.DFSClient:2272 - Could not obtain block>>>> blk_-4047236896256451627_1003 from any node: java.io.IOException: No>>>> live nodes contain current block. Will get new block locations from>>>> namenode and retry...>>>>>>>>>>>> I am obviously missing a configuration setting somewhere. . . any idea?>>>>>>>> Thanks>>>>>>>> Oleg>>>>>>>> On Fri, Oct 5, 2012 at 9:37 AM, Oleg Zhurakousky <>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>> After i clicked send I found the same link ;), but thank you anyway.>>>>>>>>>> Oleg>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 9:34 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>>>>>>>> Hi,>>>>>>>>>>>> You might be looking for something like :>>>>>> UserGroupInformation.createRemoteUser(user).doAs(>>>>>>>>>>>> see>>>>>>>>>>>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>>>>>>>>>>>> It is a JAAS wrapper for Hadoop.>>>>>>>>>>>> Regards>>>>>>>>>>>> Bertrand>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <>>>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>>>>>> I am working on some samples where I want to write to HDFS running>>>>>>> on another machine (different OS etc.)>>>>>>> The identity of my client process is just whatever my OS says it is>>>>>>> (e.g., 'oleg') hence:>>>>>>>>>>>>>> 08:56:49,240 DEBUG IPC Client (47) connection to />>>>>>> 192.168.15.20:54310 from oleg ipc.Client:803 - IPC Client (47)>>>>>>> connection to /192.168.15.20:54310 from oleg got value #2>>>>>>>>>>>>>> But there is no 'oleg' where the hadoop is running. Instead there is>>>>>>> 'hduser'.>>>>>>>>>>>>>> Is there a way or an equivalent of "RunAs" in hadoop?>>>>>>>>>>>>>> Thanks>>>>>>> Oleg>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> -->>>>>> Bertrand Dechoux>>>>>>>>>>>>>>>>>>>>>>>>>>>>> -->>> Bertrand Dechoux>>>>>>>>

> BTW, additional details on impersonation are here, including information> about a piece of configuration required to allow use of doAs.>> http://hadoop.apache.org/docs/r1.0.3/Secure_Impersonation.html>> Thank you,> --Chris>>> On Fri, Oct 5, 2012 at 7:42 AM, Oleg Zhurakousky <> [EMAIL PROTECTED]> wrote:>>> sorry clicked send too soon, but basically changing that did not produce>> any result, still seeing the same message.So I guess my question is what is>> the property that is responsible for that?>>>> Thanks>> Oleg>>>>>> On Fri, Oct 5, 2012 at 10:40 AM, Oleg Zhurakousky <>> [EMAIL PROTECTED]> wrote:>>>>> Yes I understand that and I guess I am trying to find that 'right>>> property'>>> I did find one reference to it in hdfs-defaul.xml>>>>>> <name>dfs.datanode.address</name>>>>>>> <value>0.0.0.0:50010</value>>>>>>> so i changed that in my hdfs-site.xml to>>>>>> <name>dfs.datanode.address</name>>>>>>> <value>192.168.15.20:50010</value>>>>>>>>>> But>>>>>>>>> On Fri, Oct 5, 2012 at 10:33 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>>>> Indeed, you are connecting to localhost and you said it was a remote>>>> connection so I guess there is nothing there which is relevant for you.>>>> The main idea is that you need to provide the configuration files. They>>>> are read by default from the classpath. Any place where you have a>>>> Configuration/JobConf you could also set up the right properties which>>>> would be the location of the HDFS master (and mapred if you want to do>>>> something about it).>>>>>>>> Regards>>>>>>>> Bertrand>>>>>>>>>>>> On Fri, Oct 5, 2012 at 4:15 PM, Oleg Zhurakousky <>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>> So now I am passed it and able to RunAs 'hduser', but when I attempt>>>>> to read from FSDataInputStream i see this message in my console>>>>>>>>>> 10:12:10,065 WARN main hdfs.DFSClient:2106 - Failed to connect to />>>>> 127.0.0.1:50010, add to deadNodes and>>>>> continuejava.net.ConnectException: Connection refused>>>>>>>>>> 10:12:10,072 INFO main hdfs.DFSClient:2272 - Could not obtain block>>>>> blk_-4047236896256451627_1003 from any node: java.io.IOException: No>>>>> live nodes contain current block. Will get new block locations from>>>>> namenode and retry...>>>>>>>>>>>>>>> I am obviously missing a configuration setting somewhere. . . any idea?>>>>>>>>>> Thanks>>>>>>>>>> Oleg>>>>>>>>>> On Fri, Oct 5, 2012 at 9:37 AM, Oleg Zhurakousky <>>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>>>> After i clicked send I found the same link ;), but thank you anyway.>>>>>>>>>>>> Oleg>>>>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 9:34 AM, Bertrand Dechoux <[EMAIL PROTECTED]>wrote:>>>>>>>>>>>>> Hi,>>>>>>>>>>>>>> You might be looking for something like :>>>>>>> UserGroupInformation.createRemoteUser(user).doAs(>>>>>>>>>>>>>> see>>>>>>>>>>>>>> http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/security/UserGroupInformation.html>>>>>>>>>>>>>> It is a JAAS wrapper for Hadoop.>>>>>>>>>>>>>> Regards>>>>>>>>>>>>>> Bertrand>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> On Fri, Oct 5, 2012 at 3:19 PM, Oleg Zhurakousky <>>>>>>> [EMAIL PROTECTED]> wrote:>>>>>>>>>>>>>>> I am working on some samples where I want to write to HDFS running>>>>>>>> on another machine (different OS etc.)>>>>>>>> The identity of my client process is just whatever my OS says it>>>>>>>> is (e.g., 'oleg') hence:>>>>>>>>>>>>>>>> 08:56:49,240 DEBUG IPC Client (47) connection to />>>>>>>> 192.168.15.20:54310 from oleg ipc.Client:803 - IPC Client (47)>>>>>>>> connection to /192.168.15.20:54310 from oleg got value #2>>>>>>>>>>>>>>>> But there is no 'oleg' where the hadoop is running. Instead there>>>>>>>> is 'hduser'.>>>>>>>>>>>>>>>> Is there a way or an equivalent of "RunAs" in hadoop?

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